Stay cables for structures

Abstract

A mast is erected to support a load. At least one stay cable supports the mast. The stay cable is oriented to the mast within a radial distance of the blade from the mast. The stay cable is stressed to support the mast while the wind drives the blade without collision of the stay cable.

What is claimed is: 
     
       1. An apparatus, comprising:
 a mast; 
 a rotor assembly supported by the mast, the rotor assembly having a blade driven by wind; and 
 a stay cable supporting the mast, the stay cable oriented to the mast according to an angle θ defined as tan 
 
       
         
           
             
               
                 θ 
                 = 
                 
                   
                     D 
                     B 
                   
                   
                     H 
                     S 
                   
                 
               
               , 
             
           
         
       
       the stay cable stressed to support the mast while the wind drives the blade without collision of the stay cable. 
     
     
       2. The apparatus of  claim 1 , wherein the angle θ is less than ten degrees from the mast. 
     
     
       3. The apparatus of  claim 1 , wherein the angle θ is less than seven degrees from the mast. 
     
     
       4. The apparatus of  claim 1 , wherein the stay cable has an end attached to the mast. 
     
     
       5. The apparatus of  claim 1 , wherein the stay cable has an end anchored at earth. 
     
     
       6. The apparatus of  claim 1 , further comprising a generator converting mechanical energy of the rotor assembly into electrical energy. 
     
     
       7. The apparatus of  claim 1 , further comprising an alternator converting mechanical energy of the rotor assembly into electrical energy. 
     
     
       8. The apparatus of  claim 1 , further comprising multiple stay cables supporting the mast. 
     
     
       9. The apparatus of  claim 1 , further comprising multiple blades of the rotor assembly.